the road to cabb

The Road to CABB

via POCS and MOPS

Overview

• Early Systems

• Latest System

• Future Systems

• Bandwidth Growth Trend

• Reasons for this Trend

Early Systems

• Xfilt (1994)– 16MHz– 8 Bit Data– 2 Polarizations– 1 ASIC + 2

FPGAs

• DAS (1997)– 64MHz

– 8 Bit Data

– 2 Polarizations

– 19 FPGAs + ASICs

Early Systems

• Designed on a proprietary development board• Four major design revisions

Proof Of Concept Spectrometer (POCS)

Early Systems

• POCS64 (January 2004)– 64MHz, 128 Channels

– 8 Bit Data

– 1 Polarization

– 3 VirtexII FPGAs

– Not installed at Mopra

• POCS256 (April 2004)– 256MHz, 1024 Channels

– 8 Bit Data

– 2 Polarizations

– Installed

– 3 VirtexII FPGAs

Early Systems

• POCS256 (April 2004)– 256MHz, 1024 Channels

– 2 Bit Data

– 2 Polarizations

– 3 VirtexII FPGAs

– Installed

• POCS600 (August 2005)– 600MHz, 1024 Channels

– 2 Bit Data

– 2 Polarizations

– 5 VirtexII FPGAs

– Installed

Latest System

• MOPS Z2X(October 2005)

– 2200MHz, 2 Zoom Bands each of 137.5MHz and 4096 Channels

– 2 Bit Data– 2 Polarizations– 5 VirtexIIPro FPGAs– Installed

– 1 Terabit per second of data capable of being transferred between chips

– Over 300 Billion 18 bit multiplications possible per second

Latest System

User has the choice of two separations between the zoom modes

Latest SystemResults - Spectra

C34S

CS

Latest SystemResults – On The Fly Mapping

Future Systems

• MOPS (April 2006)– 8GHz Spectrometer– 4 MOPS Z2X Boards with all

zoom modes available

• CABB– 2GHz Correlator– 8 Bit Data– 32 revised MOPS boards

Bandwidth Growth Trend

Bandwith Growth Vs Time

00.5

11.5

22.5

33.5

44.5

Time

log

(Ba

nd

wid

th)

2 Bit Data8 Bit Data

Reasons for the Trend

• ASICs largely replaced by FPGAs• Major leap in technology

– FPGAs are around 4 orders of magnitude larger than they were a decade ago

– FPGAs have more dedicated resources

• Major improvement in design tools– Simulation throughout development cycle– New debug techniques

Reasons for TrendDevelopment Tools

The End of the Road